<script setup name="Person" lang="ts">
import {watch, reactive} from "vue";

// 数据
let person = reactive({
  name: '张三',
  age: 18
})

let obj = reactive({
  a: {
    b: {
      c: 666
    }
  }
})

// 方法
function changeName() {
  person.name += '~'
}

function changeAge() {
  person.age += 1
}

function changePerson() {
  // Object.assign: 合并对象
  Object.assign(person, {
    name: '李四',
    age: 20
  })
}

function test() {
  obj.a.b.c = 888
}

// 情况三：监视【reactive】定义的【对象类型】数据，且默认开启深度监视
watch(person, (newValue, oldValue) => {
  console.log('person变化了', newValue, oldValue)
})
watch(obj, (newValue, oldValue) => {
  console.log('obj变化了', newValue, oldValue)
})
</script>

<template>
  <div class="person">
    <h1>情况三：监视【reactive】定义的【对象类型】数据</h1>
    <h2>姓名：{{ person.name }}</h2>
    <h2>年龄：{{ person.age }}</h2>
    <button @click="changeName">修改姓名</button>
    <button @click="changeAge">修改年龄</button>
    <button @click="changePerson"> 修改人</button>
    <hr>
    <h2>测试：{{ obj.a.b.c }}</h2>
    <button @click="test">修改obj.a.b.c</button>
  </div>
</template>

<style scoped>
.person {
  background-color: skyblue;
  box-shadow: 0 0 10px #000;
  border-radius: 10px;
  padding: 20px;
}

button {
  margin: 0 5px;
}

li {
  font-size: 20px;
}
</style>
